158 Parameters
Flying start The drive automatically selects the correct output
frequency to start a rotating motor. If the motor is already
rotating, drive will start smoothly at the current frequency.
The mode will start the motor with vector control and
switch to scalar control on the fly when the motor speed
has been found. Compared to the Automatic start mode,
Flying start detects the motor speed faster. Flying start
requires more accurate information about motor model.
Therefore standstill ID run is done automatically when the
drive is started for the first time after selecting Flying start.
Motor plate values should be accurate. Wrong plate
values may decrease the starting performance.
Note: Flying start cannot be used in multimotor systems.
Note: During flying start, the drive will at first run in vector
control mode. This is why, when using flying start, the
drive nominal current setting must be in the allowed range
for vector control mode. See parameter 99.06.
5
Flying start+boost Flying start with torque boost.
Flying start is performed first and the motor is magnetized.
If the speed is found to be zero, torque boost is applied.
6
21.21 DC hold frequency Defines the DC hold frequency, which is used instead of
parameter 21.09 DC hold speed when the operating mode
in use is Scalar frequency mode. See parameters 19.01
Actual operation mode, 21.08 DC current control, and
section DC hold on page 66.
5.00 Hz
0.00…1000.00 Hz DC hold frequency. 1 = 1 Hz
21.22 Start delay Defines the start delay. After the conditions for start have
been fulfilled, the drive waits until the delay has elapsed
and then starts the motor. During the delay, warning AFE9
Start delay is shown.
Start delay can be used with all start modes.
0.00 s
0.00…60.00 s Start delay 1 = 1 s
21.23 Smooth start Enables smooth start function. Smooth start function
restricts the motor current below the limit defined by
parameter 21.24 Smooth start current when the motor
speed is below 21.25 Smooth start speed.
Warning: Long run operation of smooth start at low
speed with high current may heat the motor.
Disabled
Disabled Smooth start disabled 0
Enabled always Smooth start function is always active when speed is
below limit.
1
Start only Smooth start function is only active after start while the
speed is below limit.
2
21.24 Smooth start current Current applied to motor when the smooth start is active. 50.0%
10.0... 100.0% Value in percent of the motor nominal current. 1=1%
21.25 Smooth start speed Set the smooth start speed when the current is applied. 10.0%
2.0... 100.0% Value in percent of the motor nominal speed. 1=1%
No. Name/Value Description Default
FbEq 16
ACS180 FW.book Page 158 Tuesday, March 9, 2021 2:25 PM
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